"Breaking Point: Heroin in America" shows the dark side of addiction. Parents may wonder if the report is too much for their children to see, but it reveals that children probably know more about the problem than parents think.

ANC News anchor David Muir spent more than a year on the story, talking to families, following SWAT teams and going into New Hampshire classrooms.

"There was this moment I was in Manchester inside this middle school -- I won't forget it -- talking to 11- and 12-year-olds," Muir said. "I said, 'How many of you have seen the needles, the heroin needles?' And nearly every kid in the class raised their hand."

At one point, the report shows a girl practicing how to administer the lifesaving overdose antidote Narcan on her teddy bear.

Manchester Mayor Ted Gatsas said that he was told that some dealers now carry Narcan as a selling point for their customers.

"I wish we could be as far in front of this issue as the folks who are dealing it are," Gatsas said.

Muir said the crisis is a major threat.

"I think it's threatening a good part of this generation," he said. "I think when you see the caliber of some of these lives that have been stolen, these were kids with incredible futures. Parents who would have been wonderful raising families had they not been tempted or taken down a path that they just couldn't pull themselves back out of."

Although there is a heavy emphasis on New Hampshire in the report, it also illustrates how the problem is spreading quickly around the country.